Sack-filling apparatus



Sept. 29, 1925.

F. s. DEROME SACK FILLING APPARATUS M. m J. 6 t, m wfl f w v 6 D J W M.E w d w W m a m .li. A

Patented Sept. 29, 1925.

UNITED STATES PATENT OFFICE.

FEBNAND STANISLAS nERoME, or BAvAY, FRANCE, ASSIGNOR r0 THE sooni'rn LESrILs DE A-DEROME, or BAVAY, FRANCE, A CORPORATION or FRANCE.

SACK-FILLING APPARATUS.

Application filed March is, 1925. Serial No. 16,015.

To all whom it may concern:

Be it known that I, FERNAND STANISLAS DEROME, a citizen of the FrenchRepublic, and a resident of Bavay, Department of Nord, France, haveinvented new and useful Improvements in Sack-Filling Apparatus, of whichthe following is a specification. I

The operations required for filling sacks with pulverulent or otherproducts on a large scale, necessitate a fairly large working space andexpensive labour; in fact, the sacks, after being filled with a load,weighed either beforehand or after the filling of the sack, have to betaken to a certain distance from the sack-filling station in order to besewn up or tied, labelled and sealed, after which it is again necessaryto lift them up in order to load them upon a conveyor device or othermeans of transport for carrying them to the point of delivery.

The present invention relates to an apparatus occupying a very smallspace in which these various operations are effected, and in which thefinal conveyor device for lifting or delivering the sacks is located inthe immediate vicinity of the sack-filling stations.

This sack-filling apparatus consists of a rotary platform, at thecircumference of which are arranged a certain number of stations eachprovided with a sack-filling cone or bin, which at a given point in thetravel of the platform receives the weighed charge, the latter fallinginto the sack previously fitted upon the cone; the operator at thisstation proceeds with the different operations for the closing of thesack during part of the rotary movement of the platform, then allows thesack to fall upon a conveyor device and fits upon the filling cone afresh sack in readiness to receive a new weighed charge, when thestation in question comes back again under the weighing and distributingapparatus as a result of the rotation of the platform.

The apparatus comprises preferably a trap-door device, placed at eachstation, in such a way as to allow the operator to dump the filled sackupon the conveyor device after the various operations for the closure ofthe sack are completed.

The annexed drawing represents by way of example a form of constructionof the invention.

Figure 1 is an elevation of the sack-filling apparatus.

Figure 2 is a plan view of the same.

Figure 3 is an elevation, partly in section, of the trap-door device.

Upon a raised platform a, revolving slowly around its axis a and runningby means of rollers a upon a track a supported by a frame (1., there arearranged near its periphery a number of stations A corresponding to thecontemplated production or output; each of these stations A comprises aseat 5 for an operator, in front of whom is a sackfilling bin or cone 0.'Thelatter is intended to receive, at a definite point in the travel ofthe platform a, the previously weighed charge which falls directly intothe sack which the operator has previously fitted beneath the fillingcone 0. This delivery of the charge into the filling cone, and there- Pfore into the sack, takes place when the station under considerationreaches the position A beneath the distribution hopper (l, supplied byautomatic balances or scales regulated to the desired load.

While the platform performs in this way almost one complete revolution,the operator has time to tie up or to sew the filled sack, to label itand to seal it; then when he arrives at a given point A near thesack-fill ing point A a trap-door device dumps the finished sack upon aconveyor deviceconsisting of an inclined chute c placed beneath therevolving platform a. This conveyor device leads the sack to a suitabletransporter f of any kind. During this time, the operator fits a freshsack on the bottom of the filling cone 0, in readiness to receive theload for the fresh sack when a complete revolution of the platform hastaken place, that is to say, when his station comes round to the point Abeneath the distributing hopper (Z. The same applies for each of theoperators at the other stations, so that the output of the apparatus isproportional to the number of stations.

As represented in Figure 3, the trap-door device allowing the dumping ofthe filled sack upon the conveyor device 6 after the closing operationsare completed may present the following arrangement At each station,there is provided, in the floor of the revolving platform (I and infront of the operators seat 7), a pivoted trap-door 9 upon which theclosed, labelled and sealed sack it rests. This trap-door g, pivoted at9 opens instantaneously upon the operation of a pedal 9 placed withinreach of the operator seated at Z) in front of the sack. Acounter-weight 9 tends to return the trap-door 9 immediately to itsclosed position, and an automatic latch g prevents it from opening againof its own accord.

When the operator presses his foot upon the pedal 9 thus releasing thelatch g, the weight of the sack it opens the trap-door g, which assumesthe position represented in dotted lines, while the sack falls upon theinclined plane or chute e of the conveyor device. Thereupon thecounterweight returns to its initial position and raises the trap-door gto the closed position in which it is retained by the latch 9 under theaction of a spring 9 It is to be understood that this trap door devicehas been given only by way of example and that it might be replaced byany other suitable means, for example by a de vice for dumping the sackautomatically upon the conveyor device when its different operations ofclosure are finished.

Likewise, instead of a single weighing and distributing device (Z, asrepresented in the drawing, the sack-filling apparatus might comprisetwo such devices arranged at diametrically opposite positions above theplatform; in this case, the whole of the opera tions for closing thesacks would be performed in one half-revolution of the platform, and inthis way two conveyor devices might be served, the completed sacks beingdumped at two diametrically opposite points. There might also beutilized a larger number of these weighing and distributing devices (5,such devices as well as the necessary conveyors being arranged atsuitably spaced positions around the periphery of the platform.

It is not necessary that the conveyor devices be located beneath theplatform, since by raising the latter more or less the sacks can bedelivered by oblique and movable chutes upon transporters situated atvarious horizontal distances from the site of the platform.

The improved sack-filling device reduces to a minimum the spaceoccupied, as well as the labour necessary, since all lifting or handlingof the sacks is obviated.

What I claim is:

l. A sack-filling apparatus, comprising a'rotary platform, a number ofstations arranged at the circumference thereof, sack filling means ateach station, material weighing and distributing means above thecircular path of said stations, and discharging means for the filledsacks.

2. A sack-filling apparatus, comprising a rotary platform, a number ofstations arranged at the circumference thereof, a sack filling cone ateach station, material weighing and distributing means above thecircular path of said stations, and discharging means for the filledsacks.

3. A. sack-filling apparatus, comprising a rotary platform, a number ofstatlons arranged at the circumference thereof, sack filling means ateach station, material weighing and distributing means above thecircular path of said stations, a trap-door device at each station,adapted to dump each sack after filling thereof, and discharging meansfor the filled sacks.

In testimony whereof I have signed my name to this specification.

FERNAND STANISLAS DERO'ME.

